Wound Dressings and Systems with Low-Flow Therapeutic Gas Sources for Topical Wound Therapy and Related Methods

A dressing configured to be coupled to tissue to facilitate delivery of therapeutic gas to the tissue, the dressing comprising:

• a manifold that defines a plurality of gas passageways, the manifold configured to allow communication of therapeutic gas to the tissue;
• a sorbent layer including a foam or a non-woven textile, the sorbent layer configured to be disposed below or above the manifold and to draw exudate away from the tissue;
• and
• a gas-occlusive layer configured to be disposed over the manifold and coupled to the tissue such that an interior volume containing the manifold is defined between the gas-occlusive layer and the tissue and the gas-occlusive layer limits escape of therapeutic gas from the interior volume.

A system comprising:

• a dressing having
• a manifold that defines a plurality of gas passageways, the manifold configured to allow communication of therapeutic gas to the tissue;
• a sorbent layer including a foam or a non-woven textile, the sorbent layer configured to be disposed below or above the manifold and to draw exudate away from the tissue;
• a gas-occlusive layer configured to be disposed over the manifold and coupled to the tissue such that an interior volume containing the manifold is defined between the gas-occlusive layer and the tissue and the gas-occlusive layer limits escape of therapeutic gas from the interior volume;
• an oxygen source;
• and
• a conduit configured to be coupled between the oxygen source and the dressing to permit communication of oxygen from the oxygen source into the interior volume of the dressing.

A method comprising:

• coupling a dressing to a patient's tissue, wherein the dressing comprises:
• a manifold that defines a plurality of gas passageways, the manifold configured to allow communication of therapeutic gas to the tissue;
• a sorbent layer including a foam or a non-woven textile, the sorbent layer configured to be disposed below or above the manifold and to draw exudate away from the tissue;
• a gas-occlusive layer configured to be disposed over the manifold and coupled to the tissue such that an interior volume containing the manifold is defined between the gas-occlusive layer and the tissue and the gas-occlusive layer limits escape of therapeutic gas from the interior volume;
• and
• introducing therapeutic gas into the interior volume of the dressing.